Deploy the ckan helm chart on Oracle Kubernetes Engine (OKE)

Question

Pulumi · Accepted Answer

Deploying a CKAN Helm chart on Oracle Kubernetes Engine (OKE) involves several steps. First, you'll need to set up OKE, which is a managed Kubernetes service provided by Oracle Cloud Infrastructure (OCI). Then you can deploy your CKAN application using a Helm chart. Helm is a package manager for Kubernetes, which allows you to define, install, and upgrade complex Kubernetes applications. Helm charts are packages of pre-configured Kubernetes resources.

To begin, you have to make sure you have the Pulumi CLI installed and you are logged into the OCI console. Your OCI configuration should also be set up correctly with the appropriate credentials.

Here's a Pulumi program in TypeScript that sets up OKE and deploys the CKAN Helm chart:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as oci from "@pulumi/oci";
import * as kubernetes from "@pulumi/kubernetes";

// Create an OCI provider to interact with your Oracle Cloud account
const provider = new oci.Provider("oci", {
    region: "us-phoenix-1", // Replace with your OCI region
});

// Provision an OKE cluster
const cluster = new oci.ContainerEngine.Cluster("okeCluster", {
    // You need to fill in these details according to your OCI setup
    compartmentId: pulumi.interpolate`${oci.getTenancy({}).then(t => t.id)}`,
    vcnId: pulumi.interpolate`${oci.core.Vcn.get("existingVcn", { id: "your-vcn-id" }, { provider }).id}`,
    kubernetesVersion: "v1.20.8",
    options: {
        serviceLbSubnetIds: [], // Add your load balancer subnet IDs here
    },
    // Additional options if needed
}, { provider });

// Obtain the kubeconfig file for your cluster
const kubeconfig = pulumi.all([cluster.id, cluster.name]).apply(([id, name]) =>
    oci.ContainerEngine.getClusterKubeconfig({
        clusterId: id,
        name: name,
    }, { async: true, provider })
);

// Create a Kubernetes provider linked to OKE using the kubeconfig
const k8sProvider = new kubernetes.Provider("okeK8s", {
    kubeconfig: kubeconfig.content,
}, { dependsOn: cluster });

// Deploy the CKAN Helm chart
const ckanChart = new kubernetes.helm.v3.Chart("ckan", {
    chart: "ckan",
    version: "2.9.2", // Replace with the CKAN chart version you want to use
    fetchOpts:{
        repo: "https://ckan.github.io/helm-chart/", // CKAN's official Helm chart repository
    },
    // Values to configure CKAN. You would need to replace these with your actual values
    values: {
        ckan: {
            siteUrl: "http://your-ckan-instance.com",
            // Other CKAN settings
        },
        // Database settings, storage options, etc.
    },
}, { provider: k8sProvider });

// Export the Cluster URL
export const kubeApiServerUrl = cluster.endpoints.apply(e => e.kubernetesApiServerEndpoint);
```

This program performs the following actions:

1. It sets up the OCI provider and specifies your cloud region.
2. Provisions a new OKE cluster or connects to an existing one (in this case, replace placeholder values with your current infrastructure details, such as `compartmentId` and `vcnId`).
3. Generates a kubeconfig file that contains the information needed to communicate with the Kubernetes cluster.
4. Creates a Pulumi Kubernetes provider that uses the kubeconfig from the previous step to deploy resources on the cluster.
5. Deploys the CKAN Helm chart using the `kubernetes.helm.v3.Chart` resource, pointing to the official CKAN Helm chart repository. Here, you need to replace placeholders with the actual configuration parameters for your CKAN deployment.

To execute the above program, save it as `index.ts`, and then run the following commands:

```bash
# Install the required packages
pulumi up

# Destroy the infrastructure
pulumi destroy
```

This is a basic initialization of an OKE cluster and a Helm deployment. In practice, your CKAN Helm deployment would require a detailed configuration based on your needs, so replace the placeholder values with actual configuration details. Make sure to check CKAN's official Helm chart for specific configuration options.

Remember, running `pulumi up` will apply the Pulumi program and create the infrastructure and services defined in your code. It is always recommended to review the preview that Pulumi outputs before confirming the changes.